Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1261ae846c449c742e1652438f0c1ce70d4a6fd8bd8b3e32607cfecb887aa2c8' 
  AND token = 'k+wC926I72gyC97TIrDY70Id0rdmg2LM2rogfosDGCk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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