Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b26e29c0846482321bf59e53943ccca24ad311c35d5cbaae3ede046b8cc915ac' 
  AND token = 'srg0QhZ03VLwQOi4356nk2rbEWLhusGOUviHKX/iTps=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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