Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '91b2a52b7d5c00da179dfa26edc39241a985272ffefee788a0d54a11c3fac60b' 
  AND token = 'CSiX4wUNuEl4ER1nM9uW2ors24KmN/VWZVtdePI/BcA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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