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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e3bf34ab27e73d7958f1eea9914992292075a8a38ecac09993f14f7c94cb05bf' 
  AND token = 'nUSCdy9L0t7uk/e2mGUx2B7BDOPXcaReXE2hyyOkIGE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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