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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '06bd95d8676ee10d582d0101d4e084d8e1eb211d8bcfe972433d03b44e5399e0' 
  AND token = 'UxldvYvKKoswkSn3FkdASGFIBh7sXjvi94jCjRiEu6M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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