SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fb622eccba4783bc669e924f0b8769d96ef609833df38133f60314e4d693749f' 
  AND token = 'W2mgVJFn0zipAbsqj/yzFQYWneZ4nXsUyXBvBTsr2kg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}