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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '45d704a190a268cd49700cd7b63430cc0edeb483eabd5190dd953f6664b006ca' 
  AND token = 'Cmq4DhRSl4kup4DkEFONuPGYm1EvDavt7WuRS1W+pyk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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