Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b446ed98ac2769eaff087de884ee148983d1c7cf1bf6fd84ceffbfcbb31dbbe5' 
  AND token = '/XTEdx/9FEV3jXmHxGOhQyJk3tmGGk6Q1PgW2U4cp2A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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