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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2162e90aa37032388215c739101f886223cf1a481fa03379591299066172c600' 
  AND token = 'NZMaB89KMO47rBBiDP84yWipyffDGNxiAd5+GEXGRMo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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