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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a16e05120cf48dea826816c5355aea189cd771479e6f34a19c5cc8337ddf5043' 
  AND token = 'SE4mhJhRdGiX2J6SRZFG5u8yOy4Adft8L/DENbeUUes=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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