Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6bbb4c599b15b8c9df9938b645913a31bd104edc66f51d1decf7bc677e5c7552' 
  AND token = 'iWnFzSAulplUeDoYCBhJMIbF4sXhfxwyS4VBGW2ESCc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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