Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b063c2a091a387b2613fc0dd8eb17efdc5a69a274d211cbec7e0e3df4e56a197' 
  AND token = '8ZXNQrvHg+9Rez07atOwhGnUTgX3gHMYhImiWeInr98=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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