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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '275d811309585ff35be820c9034455a25f95586f30aaae8c67baba649abbfed9' 
  AND token = 'VeBkea0Z9kWGnptYLJ9u7t66BbXwkiwIzQlaXhPUXxM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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