Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '018a30c64ae00e02fb1214d07c9cb72e78887ab3ee931b2ae57494e7c6e7460f' 
  AND token = '/oOHUWJDEK2/AEIOCYeXxivDhLivAcro2fN1uRdJ9yY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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