Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3f714a37269dd4dcddf7bc7913affa8c28763c7ab0bdafc0d68aa72b0280601a' 
  AND token = '8E+iXNLfWLd5E5cosKY78VG+Z4KbMX2swX2+vMZdw2o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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