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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '22deb24287cf713377a757af20fe356c7f27708d2f645fa9e88dc14d7a9b7217' 
  AND token = 'WTmCvCvkXNhuUVwGYs9or4JignB5ekVE6Ayd2x1Ayxo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}