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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '022e58d5e59eb2816ef1203d2da9f0adeaf71a6cf08a44feb6d5f6c28063df24' 
  AND token = '4Z/SG0ez7rh9TuHQNcq2ZfUKbb7SMS2YKGVuQTptsGc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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