SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7d65aff097c786295bed43d06521199056b34b18282c4b913aea933d837111ce' 
  AND token = 'dm1CZnLykQpKpXAwDqLDYIg0zPWlf2Ps8idljBK8iCQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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