Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cb89ca91e6a0a6f030474d6068ee7c2eefe2a0d4ac04c92f8d68ee8e8d582afe' 
  AND token = 'Z7isVxrhPS7L5ix46XYYxeejSw/QZ99+0aVXN0+joyE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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