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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'd143f7158607a4b5be139a1ef2a56d0413d0c7ad0b1dfb41fe7c77e4fa03b0a6' 
  AND token = 'xuaOcx78e5OwLJD22045bxCBUXhzavXi6fUQPbLSdHo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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