Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a5bf00dc2f5f0255c0a2915a074392dc149835a6dd4e6c113cb435861bf9fa44' 
  AND token = 'grA0kx2hNvPh4gkCnanyQg54tRHluBHHPEGt24qopRA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00099

JSON explain

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