Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b7a5add11ae33ad2c6861ccfd0cbaeb43a683ad29f11f9f4bbc26dc9315406ae' 
  AND token = 'Oj2rC9MhjRNYy5fhky4nndbGONrEllfBXNm3zK1uPho=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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