Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ce379818b635af6ecce0b7284421a74b88e332d8c38c749499075e49fbf77640' 
  AND token = '8SWMirFEWKG9OLxFWS/qTc82p3ochAeWzA4Mm+cxFCE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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