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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'fad49297dbff7178c4c20b471f153e1d64c385ac3ac3258e9a7f9a9c7fb1103a' 
  AND token = 'cTDaLUrwvfcMzse5n7Vf9CMduJ5uT1Y33h49INCRxBQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00013

JSON explain

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