Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5581f0ccfac094ac221407fc38a965f338c0e1064aff49c066174cbe6d7f9c61' 
  AND token = 'knEBXq36gQPMErs8/ZWf5SSvcQdn2AU7BVTmROEUzro=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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