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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '736eb1fe68797d0549ede64576d68ca2d5903fe76c42d1d4dc71e9ce0de8e0de' 
  AND token = '1L4fqogtJi4kdqyxTuXu46jYSlOxIFOAAsmfbPah32s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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