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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '73365d70a9bee45b290eb9517f039a9988fe22d7d6dc2b305c9a73ef17682921' 
  AND token = 'h5DO1CDWq/9xBAF3KvCo+zgWvNiddOUHeUPK79H/A5I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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