Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7b7cb69726eb11858031607cf4fbf8c2ac45e2df07cee50ae0f7f2a9d90945fb' 
  AND token = 'Q11W3MHRx0aPteVWSQG3EXIkvOYRQ6inkHTO90Di49k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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