Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'aefe5b5988b0fb3879ee43e3277ea4aa577afeea3942be20d5921aa1de1eb6cb' 
  AND token = 'OBehako13+km2M/UxBogwFjUcI8o4EXWarAJR/l+3dg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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