Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e79798c4cc09e9046861aa2826aca3a3849e778f572ce6a0cbff1fa8b76a0d54' 
  AND token = '+itD9NRj7p7mlHpHBzjkqSB+AJDqpdWcuLiQKgb6v6Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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