Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4b04d2dfa1fbb942282df5a2745a4077ca235f16b6b2587dcf5dd20190a86936' 
  AND token = 'mhFmMiI5aT77uy1/GpfyZft0fzwLrugJZX5yXWpiYug=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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