Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3c181ed97ffa4089b27815de6fb66135e4dba9c056abbe872eb74e93e5e2aacf' 
  AND token = 'ZMX3CKIsWpm1zFyOnelgguA3f+5bgWvT1+Csb8x+O5U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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