Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c82346ed33b1db98c8117061b30f3b98bc8452f5476aaa61a62614e87c2234a1' 
  AND token = 'dbtrAAbPN94QcsWgmlYbJRFNM00Q16lCVtudVnML6EE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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