SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f29cedc6e2b2b1d4ea8e057782a743cc723c3a7cd2fe78bce8130ff2753ab965' 
  AND token = 'qslv+R0HJsvBhIoyuxgquYK1LcNs/UbYWtvVlzgWeW4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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