Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1f696351caa2555bc362dd8eb5bf4f28fee0726683a5b274bc8562a1470fbab6' 
  AND token = 'MkkbBkiiG32WBw6NKinFKWDMexuDR86yPONs828yqU4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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