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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a72a63ab2092c04ad9552060b6af12a6a6ef9b85dd399a6b05e563f12fe9c1ba' 
  AND token = 'bHg58FYVMmcf9jbxanmfdgZYVODnrdt70wj+UFPFs+k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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