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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '63d3eedef493d44ced9f1670c310200cd731a4256ba685a7ec19774ae740a865' 
  AND token = 'MBC2SNr3PySuSub2d6h1/szbU4AJaH6R/tGigkV/IyM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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