Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4480983a7beca96d4f7657add28f136af2aa26362ddb061838b8b20db9dbe88c' 
  AND token = '1+QIEa/nROXErCdgeDl0w7z1DH3TVBk4zsJ/ri2RPlo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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