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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ec4583d7da45eae1f3b8295f284195ec1fa5c9834eaa2406c2f92ad759903219' 
  AND token = 'vSyZUKGowlLIkajT7BWPaW6U/qDrEt2+eMipVKeBQT8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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