SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '054186f74f52bf8f24669b44cc7282cbd8f3c8e55234750dda7221e67acaa6eb' 
  AND token = 'ipsTQdHoBuBXveMvfOV7v5J2wgY8nmPIgRDEzck+OKI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

JSON explain

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