Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2a5356fe41c063044720ae1bc4565fd468834caed2e485680888e9f3927af75a' 
  AND token = 'XHeee5KAREJI+LAyn498nBFZyeuTnMxzuKCnBIi5SJA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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