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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8f725b57aaaee477efdebe4aed5076dc5d8200cfc1ee170a6ae8536fd9d20521' 
  AND token = 'dHU6+sVQcRGzmoaqRFthsbeJ2CxGFlf4BV7uA5H68bY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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