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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '53cc4fdc55889b1f86c76a2bc67cae15a4502db0e73162d7a62a7b6dae7c3cb5' 
  AND token = 'wd8rTteq6azcJThSfs4Wge3f/U5yyEViujIgfLVUKCw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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