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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cc8b70ce83db28c7472124045fe64eb91191c282d914b4363c178eabcaea96fc' 
  AND token = 'ItsL/5F1WRISlxYwswoI8E+2q5SBEDt5PpNZmzZPr1E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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