Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '06f3a4ce1897505cfabf57563d1d61ecb7546b1af5fb22e09867e1fba23a8a1e' 
  AND token = 'FHmXZ5auwYxZXfbNv9OcaT3IUtf9/J7JfjTlKKH4nKc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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