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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '632191aa9ff222ae74d3ec146e4f3b1353b8249df73dd6fae79eb09abe691ea3' 
  AND token = 'j4wpQce/Y75TIPtGtUx2P0giPcFG4GKs3hBwwiK/+OY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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