SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'eba38d99433d6a89291fd77fba61c4a45b8c444eff3dbd147837c83fb5142086' 
  AND token = '8oXlPpWYSIujul2zVukg1CC/Xv6K+St4+1YGhrAGOpU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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