SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '48abd9639e461cac0af54051716e527288618aff1a36ddba4c6af479deee28f0' 
  AND token = 'FqDTgiH6hfZiupwqiJ2IcxgnznFlUv9U1jG5C1X+GYc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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