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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '7b0a37089d5473dba24218900c804e0432cd56505c0e8273f7a655c42ce19c69' 
  AND token = 'Etgf57bdOIDJYV1jzJMuCyt/iSocM9hH1/8xcaqydUI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00010

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}