Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '82b12906de11b82e2ea78a0f6f4fbb64d6f3b2bf7ad5674ff92423ef7e2fec3e' 
  AND token = 'u7rhMQh2ncW+2lSEbqmw/1J9K7kBfBVMZwHRpP+qLlk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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