Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e058a88e4a0d5cff551c060870c7896d25995d1c4c9b4e0da3e50d6e24a924db' 
  AND token = 'OtvTGcas5Q8zpQGYfDMr4vnMxfkp5or+IWuDzr6GKko=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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