Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '47b6e9c290f2432e3b45306566a664d2f0b02e18e339ac947b9cec4a6fb316bd' 
  AND token = 'jYC608ZoYkJIj3zLdtajWdiqWKhjtJdRWYbDG9A54M0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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