Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ff61ce62308aba3cdba2e50890ffbdafcdbabcd8f80e7c48f51f38b40ab9b3e5' 
  AND token = 'txbmXqY1nnfO00vlil7jsUG/K1nNK67U99FRrh+MSqg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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