Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5008c643ce99c0449f83be72c97567f9806893c7c43bff571508ed6ccca2326c' 
  AND token = 'yNyU8q+s1IY4KqdXwfw4bruCfOmdZT2gzzf3gDK1RK8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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