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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '370eae92cdecc561b9e2c9d2706e938ed1f554b0cf10ff57d9b3830fb7f6054e' 
  AND token = 'LbHl8xBASrf+ST0Pj2+7CQPu7nyEvv8wW83u3s1Fxqc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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