Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5da1421011f37bce98ff193a624e1aa2031cac03acdde002f45cc8def184bcb4' 
  AND token = 'vBlBMaaXW94NDjY7+QJgH/PrPza10NrDxgyJH3IYGX8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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