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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2ee1e03784b937e95ecca5ba53d2cf1d23c973a082cb3c0eda5fd49b239c257f' 
  AND token = 'EZC9XhNm/ZyAbBhGd1Nmz6tIHZd7AhiBB75/O6NIC6s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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