Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '638dafbe899e4e99a0019e93de33e5a637f8e924b7b65aa887f4254f2921a3b3' 
  AND token = 'ELOPAAeb0CRJaYJzww6mE3HgTSmocotTPirl5yTspMM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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