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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '1d5305e4c57f948d5b338bc145170a13c6c2754f1bb093ad3001cc0451ba2185' 
  AND token = 'Yiid2bNbkLckFhjqCSNbP67ZjTuTl7S7NH36FvyuB1E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00067

JSON explain

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