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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '810bb4818b04e6e56345b6fea0870b4008ede88219002a49037700884cfc4349' 
  AND token = 'cGxJvM/qD9QHRudcdJfTmUJK4mGlBDCL6ZIq/6WrOUY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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