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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '06226e6669632228d2b2a5543385b2af3f39e82e05b2d5e2b1b8ac3d15128865' 
  AND token = 'Wfhko8AzYpMs7Ba7yizTkPOTSEpxbquDsPBH+74w4qU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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