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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '09287844e46b5c66fb5b355b5dcb0e23ad6b3750e2bcf3cb5782b7457d0d4892' 
  AND token = 'DqpiPXAYc/xzd/5VV3flzkwf1m6Cfu7ByO7Ymr7GjXk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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