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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '82c9f760e9ecee5c185fa7f48580e3d248fc9376d368ebdd6edf5cbb0112fdaa' 
  AND token = 'Odfq1klnQaNfTsxVClD7pdck+e28h5WL5B/YKr7o+To=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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