Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '78462346c7000766053eb98127c823c1eda433e1cd0095bfae8a802c33a171b3' 
  AND token = 'Vls6HhgNWarYfgKihysdy9FhZzWCizfou3ffAYOS6Xg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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