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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f9f70e9e730dae3d1b6dd5f4a25650aa3512816f4ac857cc148bc2f9669ef81e' 
  AND token = 'sGXEWBnQLEue5ylZx8O29iK5ArmIUWFI6/COtXnnQbE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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