Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '6a6500ab08456694a089ff78c67a4b6bc4914deb1596bd16fd8651bb48e58d76' 
  AND token = 'otKd9NaRDpSwLqb8HcnQ5D7mZpIt4mkJj8Uz80gIrFE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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