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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd654bd92583bd7cb8df2438adb9e5145bbf93713791c8f8909aa904f8d081bf5' 
  AND token = 'wOYPglngci0stML1dscfV9LLGHFxeaQ3x+Nm3Q0A1OE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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